Need advice on building friendships & probable relationships?

Theres two boys I'm interested in getting to know..but I don't know what to say to them. Im not good at starting or making conversations, its not that I get nervous around them, but I'm not good at making conversations.I want to get close to them both, because I believe that they are compatible with my personality..but its just a matter of spending more time with them ((which i barely have) ..How do I make the best of my conversations with them and get to know the most I could about them withouth coming onto them too strongly? What do I ask specifically? I know I have to be patient, and the friendships with build itself with time..but..I'm not. Is there anything I can do? Any help would be appreciated a lot =D